[question] forcing replacement of GIT_WC/.pre-commit-config.yaml

[roman]

Hello there,

I'm running various flake.nix inside a large monorepo, and each of these flake.nix configures a pre-commit-hook for that specific sub-project of the monorepo.

I would like the hook to override the .pre-commit-config.yaml of other flakes whenever I do a nix develop, is there a way to do this? And if not, would you be willing to support it?

[jokatzke]

I have worked around this issue by overriding the shellHook phase of pre-commit.devShell to first delete the .pre-commit-config.yaml file at the git root. Maybe this is also useful to you? :)

(config.pre-commit.devShell.overrideAttrs (old: {
  shellHook =
    let
      # delete the local `.pre-commit-config.yaml` file before creating it again.
      # this prevents the pre-commit hooks from updating when loading a development
      # environment of a sub-project
      delete-old-pre-commit-config = pkgs.writeShellScriptBin "delete-old-pre-commit-config" ''
        export root=$(${lib.getExe pkgs.git} rev-parse --show-toplevel)
        ${lib.getExe' pkgs.toybox "rm"} -f $root/.pre-commit-config.yaml
      '';
    in
    ''
      ${lib.getExe delete-old-pre-commit-config}
    ''
    + old.shellHook;
}))